Low-Frequency1fFluctuations of Resistivity in Disordered Metals

Abstract
The concept of tunneling systems has been very successful in explaining phenomena which occur in disordered solids at small energies and with long relaxation times. It is shown in this Letter that fluctuations in the tunneling systems will also produce fluctuations in the electric resistivity and that the power spectrum of these resistivity fluctuations is inversely proportional to the frequency.